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I2C registers
548
NS9750 Hardware Reference
Command Transmit Data register
Address: 9050 0000
The Command Transmit Data (CMD_TX_DATA_REG) register is the primary interface
register for transmission of data between the NS9750 BBus and I
2
C bus. This register
is write only.
Register bit assignment
Bits Access Mnemonic Reset Description
D31:16 N/A Reserved N/A N/A
D15 W PIPE 00
hex
Pipeline mode
Must be set to 0.
D14 W DLEN 00
hex
I
2
C DLEN port (iic_dlen)
Must be set to 0.
D13 W TXVAL 00
hex
Provide new transmit data in CMD_TX_DATA_REG
(tx_data_val).
D12:08 W CMD 00
hex
Command to be sent (see "Master and slave module
commands," beginning on page 546)
D07:00 W TXDATA 00
hex
Transmit data to I
2
C bus.
Table 337: CMD_REG and TX_DATA_REG
TXVAL CMD TXDATA
13121110987654321015
14
PIPE DLEN
31
29 28 27 26 25 24 23 22 21 20 19 18 17 1630
Reserved